Is it feasible to construct an air-filled parallel-plate capacitor that has its two plates separated by 0.10 mm and has a capacitance of 1.0 F? Why or why not?
No. Each plate would have an area of 1.1 × 10^7 m2
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An iron nail is brought near a magnet. Which of these is not true?
a. The nail has a north pole and a south pole. b. The nail becomes a north pole or a south pole. c. The magnet exerts an attractive force on the nail. d. The nail exerts an attractive force on the magnet. e. The nail is ferromagnetic.
Why don't we expect to find life on planets orbiting high-mass stars?
A) The stars are too hot to allow for life. B) Planets cannot have stable orbits around high-mass stars. C) The high-mass stars emit too much ultraviolet radiation. D) The lifetime of a high-mass star is too short.
A bullet of mass 0.010 kg and speed of 500 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. The work done on the bullet by the block is
A. 1250 J. B. 2.5 J. C. zero. D. -1250 J. E. -2.5 J.
The capacitors are completely discharged in the circuit shown below
The two resistors have the same resistance R and the two capacitors have the same capacitance C. After the switch is closed, the current
a.
is greatest in C1.
b.
is greatest in C2.
c.
is greatest in R1.
d.
is greatest in R2.
e.
is the same in C1, C2, R1 and R2.